About 1 to 3.5 inches of snow are expected throughout the area, with the heaviest conditions in the northern suburbs bringing upwards of 6 inches of snow. Mostly rain will fall in the south suburbs.
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However, it's the ice that will cause problems for travel.
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The advisory will be in effect from 6 p.m. Monday to 9 a.m. Tuesday for Cook, DeKalb, DuPage, Kane and Lee counties.
The advisory extends from 6 p.m. Monday to 4 p.m. Tuesday for Boone; Lake; McHenry; Ogle; Winnebago counties.
A Winter Storm Watch was issued for southern Wisconsin counties and northwest Illinois counties.
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